Electrically-heated sad-iron.



PATENTED PEB. ll, 1908.

H. HEBTZBERG & M. J. WOHL.

BLEGTRIOALLY HEATED SAD IRON. APPLICATION FILED APB. 5, 1907.

UNITED sTATEs PATENT onirica.

HARRY HERTZBERG AND MAURICE l4 WOHL, OF NEW YORK, N. Y.

ELECTRICALLY-HEATED SAD-IRON.v l

Specification of Letters Patent.

Patented Feb. 11, 1908.

Application filed April 5. 1907. Serial No. 366.529.

l Electrically-Heated Sad-Irons, of which the following is a specification.

This invention is a sad iron for domestic,

laundry, tailoring and other purposes, Wherein We contemplate employing means lfor electrically heating a mass of metal which constitutes the body of the iron. l

One object of'this invention is to' secure close contact between an electrically operated heater or resistance and a body or mass of metal', for the purpose of securing the rapid transmission lof heat from said resistance to thel mass of metal, whereby veconomy in the consumption of the current and rapid heating of the iron for service are secured.

. Another Objectis to overcome chaiing of the electrical conductors or Wires at the point Where they are attached or coupled to the device.

Another object is to overcome transmission of the heat-to the part of the iron which is to be grasped by the operator in handling or manipulating the device.

Broadly stated, our invention is a sad iron composed of a body or mass of heat absorbing metal, one or more electrically operated heaters or rheostats inclosed by and Within the body or mass, and means whereby' said heater or rheostat, or the plurality of heaters or rheostats, are held in close contact with. said body or mass.

The invention consists, further, of a' yieldable bushing connected to a part of the iron and receiving within itself the connected ends Y of a cord or cable'by which the current is supplied to the wires leading to the heater or rheostat which is inclosed by the body or mass of metal.

In ythe accompanying drawings, we have illustrated one practical embodiment of the invention, but the construction shown therein is to be understood as illustrative only, and

.- not as defining the limits of the invention. p Figure 1 is a vertical longitudinal section, partly in elevation, of a sad iron constructed in accordance with this invention, the lane of the section indicated by dott line 1-1 in Fig. Y2`1o'oking in the direction of the arrow.` Fig. 2 is a vertical cross section 'on the line 2 2 of Fig. 1. Figs. 3 and 4 are, respectively, a vertical cross section on the line 3 3 of Fig. 4 and a horizontal section on the line 4 4 of Fig. 3, showing another embodiment of our invention wherein we employ a plurality of electrically operated heaters or rehostats within a mass of metal which constitutes the body of the sad iron. Fig. 5 is a horizontal section, partly in plan, of another embodiment of our invention wherein we employ a plurality of clamping wedges adapted to form spaces for Ventilating the interior of the iron. views of dierent forms of yieldable bushings adapted to anchor the supply'cord or cable and the end portions of the wires for conveying an electrical current to a heater or heaters rinclosed within the body of 'the sad iron.

A' designates a sad iron which is composed of a body or mass of metal adapted to absorb and retain the heat which is developed by an electrical resistance, or a plurality of electrical resistanees, when the current of electric energy is supplied to said resistance or resistances. The body or mass of metal may be of any suitable or preferred shape or dimension, and as shown, said body is provided with an imperforate flat bottom member, a.. The body, A, may be composed of iron, copper or other metal, and the entire body may be cast in a single piece, as shown by the drawings, or the body may be composite, that is to say the upper part thereof may consist of iron and the lower member, c, of copper, in which case the mass of metal consists of two or more piecesV adapted to be united in a suitable way. lt is to be understood, therefore, that We may employ a body composed of one metal, all the parts of which are integral, or we may employ a composite Vmetallic body, the parts of which are made Figs. 6 and 7 are detail separately and united in a substantial manner to produce an integral body.

The body, A, of the'sad iron shown in Figs. l and 2 is provided with a longitudinal chamber, a', in whichis arranged a single electrically operated heater or rheostat, and means for clamping said heater or rheostat into close mechanical engagement with the imperforate bottom member, a, of the said body or mass. "We may employ any suitable or Well known electricallyy operated heater within the chamber, a', of the body or mass, A, but we prefer a heater wherein a thin metallic wire or ribbon, b, is coiled or wound cna core,'b, composed of a thin layer of insulating material, such as mica, said core and' the resistance formed by the metallic wire or ribbon being inclosed by and between layers of 'insulating material, preferably mica, indicated at b2, b3. The electrical heater, indicated in its entirety by the reference character B, is arranged within the chamber, a, so as to have its layer, b2 in direct contact with the imperforatev bottom member, c, of the body, A, the electrical resistance wire, l), beingnext to the layer, b2, so that it'is practically in mechanical contact with said member, a, although insulated electrically therefrom by the thin mica layer, b2.

In the construction shown by said Figs. 1 and 2 we contemplatethe employment of a lining, C, which is a poor conduct-or of heat, said lining being composedof asbestos or other non-conductor. The lining may be of any suitable thickness, and it is placed against the under surface ofthe top member or part of the body lor mass of metal.

For securing the close mechanical contact between the electrically operated heater and the bottom member, a, of the body, A, we employ a wedge or wedges adapted to clamp one part upon the other. As shown, coperating wedges, D, E, are arranged within the chamber, af', between the aforesaid heater land the non-conductor lining, C. Each wedge, D or E, is provided with van inclined face on one side and a flat face on the other side in order that the two wedges maybe assembled reversely to each other, and with their inclined faces in engagement one withy the other, While the lat face of the wedges heater into close contact with the bottom,

member, a, and'thus the electrical resistance -is clamped irmly and solidly against'the bottom member, whereby the heat developed in said resistance by the passage of electric current willl be transmitted rapidly to, and absorbed by, the bottom member, a, of the body or mass of metal. The wedges, D, E, are inserted in the body, A, for the edges at the ends and sides of the said wed es to engage with the body or mass, A, an said Wedges are, also, inj mechanical contact with vvone another, whereby the heat absorbed by the Wedge, D, from the electrical heater will be communicatedv or transmitted by the said svaofie wedges to the body or mass. The linin C, however, minimizes the transmission o .the heat to the upper part of the body or mass, so that the heat is applied to, orconcentrated on, the bottom member, a.

The iron, A, is provided with any suitable form of handle, G, for manipulating said iron.

As shown, said handle is composed of aendof the body is adapted to'be closed by a member, H, preferably in the form of a plate yadapted to be fastened to the body, A,`and

the bottom member, a, thereof. This end member, H, is provided with an Lip-standing arm, z, whichterminates in an eye or loop, zf. In this eye or loop is arranged a bushing adapted to form an anchorage for a .cord or cable, I, the latter serving to convey an electrical current to the Wire, y', by which said current is conveyed to the resistance, b, of the electrical heater. As is known in the art, the cable or cord, I, is composed of wires twisted together and provided with means, such as a plug, for attachment to a socket of an electric circuit. attached to the resistance, l, of the electric heater, and these conductorsare led through suitable openings or channels which are provided in the member, H, the ends of said conductors, j, being' joined to the conductors of the cord or cable,l I, in a manner well understood by those skilled in the art. The loop or eye, h', is integral with the upper extremity of the member, H, said loop or eye serving as a support for a bushing which is composed preferably of wire. 'which is coiled into the form shown in Fig. 6 or in Fig. 7 so as to produce a bushing, K, or K. The bushing, K of Fig. 7 is ta eringlongitudinally whereas the bushing, Ki? shown in Fig. 6 is The conductors, y', are

composed of coils, Ic, which are larger inA diameter than the coils, f, thus producing a .bushing which is shouldered at a point intermediate of its length. The bushing, K, or

`Kf, is fitted 'in the eye or loop, h', for the end portions of said bushing to project beyond the eye or loop. When the bushing, K, of Fig. 6 is used in the manner shown in Fig. 1, theshoulder of said bushing engages with one. end portion of the eye so as to ljmitthe bushing against movement within said eye.

ductors, j, and thecord or cable to pull apart in the use of the iron. The primary function,

however, of this yieldable bushing is to overcome the tendency of the cord or cable to cha-fe or rub the insulation from the wiresthereof. v

In Figs. 3 and 4 of the drawings we have shown a sad iron provided with two or more pairs of electrical heaters for the purpose of quickly heating a large heavy sad iron, such as those used in laundering and tailoring operations. The body or mass, A, is provided with a plurality of longitudinalchambers, m, which are separated by intermediate walls, m-, of metal, the latter being integral with the body or mass, A. Eac chamber, m, containsv two of the electrical heaters indicated at B', which heaters are arranged lengthwise of the chamber and are arranged for engagement with the opposite side walls of said chamber. Said heaters are forced into close mechanical contact with the respective side Walls of the chamber by coperating metallic wedges, D E', the latter having engagement with the respective heaters and with the body or mass of metal, whereby the heaters are adapted to-heat the iron and the walls m thereof and said wedo'es com- 7 7 7 5 municate the heat aborbed thereby to the body or mass of metal, thus quickly transmitting the heat to the body or mass of metal for the purpose of uniformly and rapidly bringing the iron to a temperature required for service. The electrical heaters in the several chambers may be connected in series or in multiple, and the several chambers, m, are adapted to be closed individually, or by a plate, m2, which is common to all of said chambers.

Fig. 5 of the drawings represents lanother embodiment of our invention wherein we employ a' perforated layer of mica, b5, as the core for" the winding of the electrical resistance wire or ribbon, and a plurality of short wedges adapted to beV used in lieu of the wedge, E, said short wedges coperating with a single wedge, D, and providing certain spaces within the bodyT or mass of metal for the escape-of hot air therefrom, thus ventilating the body or mass-of metal above the imperforate bottom member, a., thereof.

lt will be understood that the perforated core b", of mica isused in lieu of an imperforate core, t', shown in Figs. 1 and 2, and further, that the resistance wire or ribbon is coiled or wrapped on this core, the'parts being inclosed by andf between other layers of mica, such as the layer, 52, b3. If desired, however, all the layers of mica may be erforated for Ventilating purposes. The e ectrical heater, B2, of Fig. 5 is constructed in substantially the manner heretofore described in connection with Figs. 1 and 2, except that one or more of the layers of mica are perforated. Such a heater is placed within the chamber of the body or metallic mass,

ably shorter. These Wedges, E, are adaptedv to be inserted in the manner heretofore de- .scribed so as to space the wedges, E', and

rovide certain openings, e, for the escape of iieat' from the chamber of the body or mass of metal.

Having thus fully described the invention, what we claim as new, and desire to secure by Letters- Patent is:

1. In a device ofthe class described, `a chambered metallic body having a bottom member, an electrically operated heater in .said body, and coperating wedges for coniining said heater in close contact with said bottom member.

2. In a device of the class described, a chambered metallic body having a'bottom member, a plurality of electrically operated heating elements in said body, andv means within the body for clamping said heating elements into close contact with said bottom member.

3. In a device of the class described, a chambered metallic body having a bottom member, a plurality of electrically operated heating elements in said body, and Wedges for clamping said `heating elements into close contact with said bottom member.

4. In a device of the class described, a

chamberedbody or 'mass of metal,`an electrical heater therein, anda plurality of cooperating Wedges'for clamping said heater into close contact with said body, certain of the wedges being spaced to provide for the circulation of air between them.

5.' In a device of the class described, a chambered body or mass of metal, an electrical heater therein, and upper and lower wedges for clamping said Aheater into close contact with said body or mass of metal, certain of said Wedges being spaced and pro` vidin air circulation spaces through the cham er of said body or mass.

6; In a device of the class described, a chambered body or mass of metal, an electrical heater therein, and a plurality of spaced wedges engaging with said heater and forming in the body spaces for the circulation of air.

7. In a device of the class described, a body composed of heat-absorbin metal and providedwith a plurality of c ambers, a heater in each chamber,.and Wedgingmeans in each chamber for clam ing the heater in the same chamber into c ose contact with the body.

8. In a device of the class described, a body2 composed of heat absorbing metal and provided Witha plurality of chambers, a plurality of heaters in each chamber, and cooperating wedges between said heaters and adapted to conine the latter into close contact with the metal of the body.

9. In a device of the class described, a body provided with a plurality of chambers which are se arated by intervening walls, an electrical eater in each chamber, and wedges for clamping each heater into close `contactwith a wall of said body. l

In testimony whereof we .have signed our 10 names to this specification in the presence of two subscribing witnesses.

HARRY HERTZBERG. MAURICE J. WOHL. 

